if (document.images) 
{
   img1 = new Image();
   img2 = new Image();
   img3 = new Image();
   img4 = new Image();
   img5 = new Image();
   img6 = new Image();
   img1.src = "images/pointer.gif";
   img2.src = "images/xhtml.gif"
   img3.src = "images/css.gif"
   img3.src = "images/bob_508.gif"
   img3.src = "images/bob_aaa.gif"
   img3.src = "images/bob_508-ovr.gif"
}